Patent GB-189721937-A (GB)
Title: Improvements in Rolling Mills.
Inventor: HADDAN REGINALD
Filed: 1897-09-24
Granted: 1898-11-24
Abstract: 21,937. Haddan, R., [Grey, H]. Sept. 24. Rolling.-Relates to a mill train, for rolling girders, beams, and columns, and consisting of a universal mill B for rolling the web and the inside and the outside of the flanges, a two-high mill A for rolling the edges of the flanges, and feed-tables C', C' at opposite ends, the rolls B<1>, B' and A<1>, A<x> being geared together and driven alternately in opposite directions. The vertical rolls D, D<1> are coupled to friction discs d, which are connected to the pistons E of hydraulic cylinders F on the slides H. Fluid under pressure admitted into the cylinders F forces the discs d against the friction driving-discs B<3> on the roll B', the upward motion of which is limited by the adjusting- screws L. The slides H are adjustable by screws H<2> and are provided with a roller thrust bearing J for the vertical rolls D, D'. As the flanges bearing against the sides of the rolls B', B' are advanced more slowly than the web, the side rolls D, D<1> are fed forward after each pass through a distance greater, by about one-fourth, than the horizontal rolls, in order to produce girders with regular ends. Any suitable mechanism may be used for connecting the screws L and H<2> to produce the required movement. In the arrangement described, the screws H<2> are of 25 per cent. greater pitch than the screws L, and both sets of screws are driven at the same speed by suitable gearing from a shaft M actuated by an electromotor m<2>. The top roll A<1> of the rolls A is raised by counterweighted levers and lowered by the screws A<10>. To maintain the web of the girder midway between the rolls, a loose ring i, fitting between the flanges of the girder, works in a recess in the roll A<x> and is fed upwards after each pass at half the speed that the roll B<1 >is fed downwards. In the arrangement described, this is effected by a saddle i<2> with antifriction rollers i<3> raised by a screw i<5>, of half the pitch of the screws L, and driven at the same speed from the shaft M through the bevel gearing i<13>, shaft i<12>, and bevel and worm gearing. The ring i may be on either roll A<1>, A<x>. The girder &c. is supported on small cross-rolls j, j<1>, the roll j<1> being driven from a feed-roller of the table C<2>. In order to remove scale, the work is tumbled or turned over on the table C<2> by means of arms C<8> on a shaft C<7>, operated by a hydraulic cylinder C<14>, rod C<12>, rack C<11>, and pinion C<10>. The arms C<8> turn the work against inclined supports C<9>, and the turning over is completed by a pushing-piece C<20>, pivoted on a rod C<18> of a hydraulic cylinder C<17>. Bottom guides Q, Q<1> are provided on each side of the rolls B. The upper guide T, entering between the flanges of the girder &c., is adjustable with the roll B<1>, and is suspended from a bracket on a cross-bar or slide T<3> by counterweighted levers T<1>, T<2>. The cross-bar T<3> is attached at each end to the pistons of closed cylinders T<5>. The pistons T" of open-topped cylinders T" are connected with the bearings of the top roll B'. The bottom of the two cylinders T" and the upper ends of the two cylinders T<5> are connected by pipes V<4>, V<7> and a valve chamber V<1>, the valve V in which is opened and closed simultaneously with the commencement and the cessation of the rotation of the screws L. This is effected by actuating the valve by means of a solenoid V", arranged in series in the same circuit with the motor m<2>. Side guides r extend from the rolls B beyond the rolls A to the table C', and are connected to and move with the slides H. The outer ends of the guides are connected with the pistons of cylinders r<5>, provided with supply p i p e s r<6> containing a valve and solenoid arrangement r<7>, r<13>, similar to the valve V and solenoid V", to ensure the motion of the guides r with the rolls B', D, D<1>. Side guides R at one side of the rolls B are connected with the slides H and are capable of being moved independently by means of hydraulic cylinders R<3>, the motion being limited by stop nuts R<6>, R<7>,